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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 333 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.10% of 770 =
  2. 2.15% of 520 =
  3. 3.25% of 590 =
  4. 4.5% of 700 =
  5. 5.1% of 260 =
  6. 6.5% of 310 =
  7. 7.10% of 660 =
  8. 8.10% of 610 =
  9. 9.20% of 530 =
  10. 10.5% of 80 =
  11. 11.15% of 50 =
  12. 12.10% of 470 =
  13. 13.15% of 230 =
  14. 14.15% of 690 =
  15. 15.15% of 260 =
  16. 16.15% of 860 =
  17. 17.20% of 600 =
  18. 18.25% of 500 =
  19. 19.5% of 870 =
  20. 20.1% of 60 =
  21. 21.15% of 420 =
  22. 22.10% of 480 =
  23. 23.15% of 840 =
  24. 24.20% of 770 =
  25. 25.5% of 140 =
  26. 26.25% of 820 =
  27. 27.5% of 630 =
  28. 28.10% of 220 =
  29. 29.25% of 90 =
  30. 30.1% of 600 =
  31. 31.20% of 120 =
  32. 32.50% of 140 =
  33. 33.10% of 190 =
  34. 34.5% of 100 =
  35. 35.5% of 720 =
  36. 36.20% of 200 =
  37. 37.50% of 150 =
  38. 38.15% of 880 =
  39. 39.25% of 590 =
  40. 40.50% of 20 =

Answer key

  1. 77
  2. 78
  3. 147.5
  4. 35
  5. 2.6
  6. 15.5
  7. 66
  8. 61
  9. 106
  10. 4
  11. 7.5
  12. 47
  13. 34.5
  14. 103.5
  15. 39
  16. 129
  17. 120
  18. 125
  19. 43.5
  20. 0.6
  21. 63
  22. 48
  23. 126
  24. 154
  25. 7
  26. 205
  27. 31.5
  28. 22
  29. 22.5
  30. 6
  31. 24
  32. 70
  33. 19
  34. 5
  35. 36
  36. 40
  37. 75
  38. 132
  39. 147.5
  40. 10

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